Assessment of crop health in relation to competition from weeds: using balloon-borne images and pectrometer data

Darr, Shawn Geoffrey (2004) Assessment of crop health in relation to competition from weeds: using balloon-borne images and pectrometer data. [USQ Project] (Unpublished)


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Remote sensing is increasingly being applied to agricultural applications. It offers
the ability to quickly and efficiently supply information about the spatial
variability that occurs within fields. Recently remote sensing technology has been
successfully applied to identify and mapping weeds within crops. Weeds pose a
serious threat to crop health and can adversely affect yield. The opportunity exists
to explore new applications of remote sensing in the agricultural setting
particularly measuring crop health.
This study covers the application of remote sensing to detect weed-induced stress
in grain crops. The aim of the study was to determine the ability of spectral data,
captured by a low cost balloon-borne camera system and a spectroradiometer, to
discriminate between a healthy and stressed crop. Spectral data was collected
from a weed trial site that contained several sorghum varieties planted at different
planting densities and with or without weeds. Discriminant function analysis was
conducted on the data captured by the two sensors to analyse the ability of
spectral data to be used to differentiate between the crop containing weeds and the
crop without weeds. The results of the analysis indicate that the spectral data
from both sensors can be used to distinguish between the healthy and stressed
crop. These results provide sufficient cause to suggest further research is
warranted into the application of remote sensing as a tool for measuring crop

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 11 Oct 2007 00:12
Last Modified: 02 Jul 2013 22:30
Uncontrolled Keywords: remote sensing, spectroradiometer, balloon borne data, grain crops, weed induced stress, crop health
Fields of Research (FoR): 09 Engineering > 0909 Geomatic Engineering > 090905 Photogrammetry and Remote Sensing
07 Agricultural and Veterinary Sciences > 0706 Horticultural Production > 070603 Horticultural Crop Protection (Pests, Diseases and Weeds)

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